Abstract：The large water flow standard facility is the core device for carrying out large pipe diameter flow meter test and ensuring the accuracy and reliability of traceability and transmission of large water flow value, and the measurement and control system is an important part of the flow standard facility. At present domestic specialized study of large water flow facility control system for less, the existing research results has far lags behind the water flow metrology technology present situation, and difficult to meet the society for large diameter flow meter automatic, intelligent and high accuracy calibration requirements. These problems in turn restrict the further popularization and application of large water flow standard facility. A control system suitable for the large water flow standard facility is designed and developed, and the performance level of the system is evaluated by flow stability and response time of flow regulation. The experimental results show that: When the pipeline flow rate is in the range of (480~7800) m3/h, the system stability Eq=0.193%<0.2%; and when the flow rate increases from 0 to 8500 m3/h, the system response time is about 110s, which indicates its performance level is relatively excellent.
2022, Vol. 